1121142 has 16 divisors (see below), whose sum is σ = 2446272. Its totient is φ = 339720.

The previous prime is 1121101. The next prime is 1121143. The reversal of 1121142 is 2411211.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8428 + ... + 8559.

It is an arithmetic number, because the mean of its divisors is an integer number (152892).

2^1121142 is an apocalyptic number.

1121142 is an abundant number, since it is smaller than the sum of its proper divisors (1325130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121142 is a wasteful number, since it uses less digits than its factorization.

1121142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17003.

The product of its digits is 16, while the sum is 12.

The square root of 1121142 is about 1058.8399312455. The cubic root of 1121142 is about 103.8851666440.

Adding to 1121142 its reverse (2411211), we get a palindrome (3532353).

The spelling of 1121142 in words is "one million, one hundred twenty-one thousand, one hundred forty-two".